Have you watch the gifs in lpc-walls you linked. Way I think of how to use walls is that think whole map filled with black, then you carve your walls into the map. So that is the wall topping, see gif: 

Then each topping can have what every wall pattern you like, they are mostly 3 tiles tall. There are left and right 3 tiles and then center tiles which can be repeated. There can be a little bit of shadow next to wall in order to create contrast next to the walls. When I used LPC, my game engine did that automatically. See that also picture on below.

Then it depends on your game engine if you want that characters are able to walk "behind" the walls, or are the only able to walk tiles which are fully visible. Since walls are three tiles tall, there should be room to walk next to actual wall. Problem is just how to draw it. See bottom of the map in this picture: